var req ;     	
//var req = new Object();     	

function h_get(url, func) {

  if (window.XMLHttpRequest) {
  req = new XMLHttpRequest();    

  }
 else if(window.ActiveXObject) {
  req = new ActiveXObject("Microsoft.XMLHTTP");
  }

if(typeof func != 'undefined')
  req.onreadystatechange = func;

  req.open('GET', url, true);
  req.send(null);

}